著者

阿部 学 アベ マナブ Abe Manabu

出版者

千葉大学大学院人文社会科学研究科

雑誌

千葉大学人文社会科学研究科研究プロジェクト報告書 (ISSN:18817165)

巻号頁・発行日

vol.257, pp.18-30, 2013-02-28

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千葉大学大学院人文社会科学研究科研究プロジェクト報告書第257集『都市コミュニティにおける相互扶助と次世代育成』水島治郎 編"Sustainable Urban Communities: Communality and Generativity" Report on the Research Projects No.257

著者

Hashimoto Takuma Abe Manabu

出版者

日本哺乳類学会

雑誌

Mammal study = The Continuation of the Journal of the Mammalogical Society of Japan (ISSN:13434152)

巻号頁・発行日

vol.26, no.1, pp.35-44, 2001-06-01

被引用文献数

2 4

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Two species of moles, <i>Mogera tokudae</i> and <i>M. imaizumii</i>, are parapatrically distributed in the Echigo Plain in the northern part of Niigata Prefecture, Japan. The two species are morphologically similar, except for the larger body size of <i>M. tokudae</i>. To clarify whether interspecific competition affects body size and reproductive traits of these moles, we compared these characteristics in syntopic populations with those in allopatric populations for both species in the Echigo Plain. <i>Mogera tokudae</i> exhibited little body size difference between allopatric and syntopic populations, while body size of <i>M. imaizumii</i> in syntopic populations was significantly smaller than in allopatric populations. Although litter sizes of both species were almost the same, reproductive schedules were different. Pregnant <i>M. tokudae</i> were captured mostly in late April, whereas <i>M. imaizumii</i> had a longer period of reproduction from March to October; some individuals bred twice a year. The relatively small body size and the longer breeding period observed in <i>M. imaizumii</i> of the Echigo Plain may be tactics for increasing reproductive success under severe interspecific competition from <i>M. tokudae</i>.

著者

Sone Koichi Okumura Hideo Abe Manabu Kitahara Eiji

出版者

鹿児島大学

雑誌

Memoirs of the Faculty of Agriculture, Kagoshima University (ISSN:04530853)

巻号頁・発行日

vol.35, pp.7-16, 1999-03-15

被引用文献数

3